NAME

SRC/claset.f

SYNOPSIS

Functions/Subroutines

subroutine claset (uplo, m, n, alpha, beta, a, lda)
CLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Function/Subroutine Documentation

subroutine claset (character uplo, integer m, integer n, complex alpha, complex beta, complex, dimension( lda, * ) a, integer lda)

CLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Purpose:



 CLASET initializes a 2-D array A to BETA on the diagonal and


 ALPHA on the offdiagonals.

Parameters

UPLO



          UPLO is CHARACTER*1


          Specifies the part of the matrix A to be set.


          = 'U':      Upper triangular part is set. The lower triangle


                      is unchanged.


          = 'L':      Lower triangular part is set. The upper triangle


                      is unchanged.


          Otherwise:  All of the matrix A is set.



          M is INTEGER


          On entry, M specifies the number of rows of A.



          N is INTEGER


          On entry, N specifies the number of columns of A.

ALPHA



          ALPHA is COMPLEX


          All the offdiagonal array elements are set to ALPHA.

BETA



          BETA is COMPLEX


          All the diagonal array elements are set to BETA.



          A is COMPLEX array, dimension (LDA,N)


          On entry, the m by n matrix A.


          On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j;


                   A(i,i) = BETA , 1 <= i <= min(m,n)

LDA



          LDA is INTEGER


          The leading dimension of the array A.  LDA >= max(1,M).

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 105 of file claset.f.

Author

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